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W XQsA QK Q A. H. ANTHONY.

FLOAT VALVE FOR BOILER FEED APPARATUS.

APPLICATION FILED MAY 22. ms.

1,315,651. Patentease t. 9, 1919.

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nnrnnn Hyman nn'rnonx, or cononns'rnnnnennnn FLOAT-VALVE r012. cornea-rem APPARATUS.

spein fi n of L t P Patented Sept. 9, 1919.

Application filed May 22, 1918. Serial No. 236,052.

To all whom it may concern:

Be it known that I, ALFRED HYMAN AN- rnoxr, a subject of theKin of England, residing in Colchester, Essex, 4 ngland, have invented certain" new and useful Improve ments in Float-Valves for Boiler-Feed Apparatus, of which the following is a specification.

This inventionrelates to float-operated valves in boiler-feed apparatus of the type comprising a float-operated valve employed to control the escape offiuid that has leaked under high pressure pasta piston which is a balancing or controlling piston for the boiler-feed check-valve.

The float-operated valve referred to has heretofore been constructed as a needlevalve, having a conical point impinging upon a correspondingly coned seating, and it has been foufndthat such a needle-valve is liable to damage by being violently forced upon its seating, for instance under improper use of the testing handle provided for testing thefreedom of the float," 01' again, for instance, when thevalve-box has been removed for examination and is carelessly replaced. Furthermore, when r the valve-box 1s removed the said needle-valve is left exposed and projecting through its guide and is so open to' damage through The present invention, therefore, resides in the selection for the tloat-operated valve in apparatus of the type defined, of a piston-valve of small diameter. The chameter may conveniently be about that of the needle-valve above referred to as hereto fore commonly employed. The selection of such a valve for the float-operated valve has not only the above referred to advantage of obviating the risk of damage, since it does not have to impinge upon a seating which limits itstravel, but the further ad vantage that, owing to its small diameter, it can be made suflicientl fiuid-tight'for the yet be sufliciently free not to impair unduly thesensitivity of the action of the float. This is of importance since'apparatus. of the type defined frequently has: to be relied upon to maintain the water-level within less than half an inch from a normal value. It will be obvious that, as the pres-u the latter with the axis of the piston will inevitably cause binding.

The, present invention, therefore, provides,

gin apparatus of the type above defined, a float-operated piston-valve of the said small diameter, and a guide therefor in combination with a seating for the valve and a guide-Way for the guide, which seating and guide-way are both formed in a single piece of metal. The object of this is to secure the advantage referred to with regard to accuracy of alinement.

By way of further description of the naone of this invention, one embodiment thereof. is now described with reference to the accompanying drawing which is a vertical central section through the example given. mThetop or cover of the float-box is ,indicated at A, portion-of the float-arm at-B,

and: the pivot of the arm at C. The valve :operated by the float isseen at D, D and is in the form of two co-axial cylinders, one, D, of which is of small diameter, say about an eighth of "an inch, and theother, D of' which is larger, 1 say about threeeighths vofan inch. Where the parts D I) meet, a square shoulder D is left. The portion D constitutes the valve and the portion D 'its guide. The free end of the valve coned as at D or 1t: may be rounded.

A jcomblnedguideway and seating E is formed from a single block of metal by.bor-- ing two co-axial cylindrical holes F, 'F therein, a smaller, F, extending to one face of the block to constitute the seating for the piston valve 7D and the other, F extending to the other face ofthe block to constitute 'a way for the guide D high pressure against w nch it operates and lilxtreme care is employed 1n the boring of these holes to inthe parts they fare intended to receive. Where the one cavity communicatcswith the '1? is an enlargement f from which a duct G passes through the body of theseating-block sure their being a'closc and accurate fit on to give communication with the outside of the block.

The block E is formed with a cylindrical stem E and a conical head E The latter is ground to make a steam-tight fit with a correspondingly-coned hole in the bottom of the valve-chest H, and the stern E "enters a hole in the cover A of the float-box, with which joint is made under the shoulder of the head E- in any convenient manner. The valvechest H is bolted down on to the cover A by means not shown in the drawing, and so holds both joints steam-tight.

The valve-chest H has an inlet J for the leak-water from the boiler-feed and an outlet K communicatingby a duct K with an annular recess E in the block with which the duct Gr communicates.

The length of the head E is made long enough to constitute a protector for the valve D even when the shoulder D ishome upon the shoulder e, in which position of the parts the valve D does not protrude above the face of the'block E. The upper face of the latter is recessed as shown Sothat the actual seating surface of thehole F is less than it otherwise would be, While the end D is neverthelessalways shielded.

The guide-portion D abve described as cylindrical, is not strictly so since one or more flats 'are formed. on its otherwise cylindrical periphery, one of such flats being indicated at D. The object of this flat, or these flats, is to prevent the steam-pressure with which the valveis urged upward from being applied to the whole area of the guide; the admission of the pressure to abovethe shoulder D linsures that the said pressure '7 shall only be exerted 'on'the relativelysmall 7 that they may be handled as a single piece in the machining operations required to form a area of thevalve itself, D. s

The coned or rounded endD of the valve facilitates its ready entrance into the seating. When, underthe actionof the float,

it is so far withdrawn thatsthe upper end gives communication for, the leak-waterto pass to the said enlargement f,'the water can escape, but when thevalveis moved upward from such a position it is closed. A

further advantage obtained by the present invention is that, owing to the small diameter employed for the valve, it can be made sufiiciently fluid-tight without sacrificing the requisite freedom to permit its being operated in a sensitive manner by the float.

Whereas it has been above stated that the seating andguide-way are formed in a sin-- gle piece of metal, it is to be understood that the block E may be builtup of more than one piece of'metal provided theseare so secured together, as for example by soldering,

the seating F and the guide-way F Whil it is desirable that the. seating F and the by guide-way F should be machined at one opport f and the portion below it, should be thus manufactured'since the whole success of the device depends upon accuracy of fit upon the plunger and alinement of these last said two holes. a

What I claim as my invention and desire to secure by Letters Patent is l v v 1. In apparatusfor automatically controlling the fiow of feed-water to a boiler, the combination of a valve-chest having an in- 7 let, an outlet and a cylindrical port consti-- tuting' a valve-seating arranged to put the said inlet into communication with the said outlet, a piston-valve cooperating with said seating, means for guiding the.pistonvalve coaxially'with said port, anda float-arm o eratively connected to the piston-valve, su stantially described. a

2. In apparatus for automatically controllingtheflow of feed-water to a boiler, the combination of a valve-chest having an inlet, an outlet and-a cylindrical portconstituting a valve-seating arranged to put the said inlet into communication with the said outlet, apiston-valve of a diameter less than three-sixteenths of an inch cooperating with said seating, means for guiding the piston-; valveco-axially with said port, and a float- 95 arm operatively connected to the piston valve, substantially as described. 3. In apparatus for automatically control-v ling the flow of feed-water to a boiler, the

,combination of avalve-chest having an inlet and an outlet, a valve-seating block fitted into the; wall of the valvechest and having 'a cylindrical port constitutinga valveseating arrangedto put the said inlet into 7 communication with the said outlet, said combinationof a valve-chest having an inlet 7 and an outlet, a valve-seating block fitted into the wallof the valve-chest and having a cylindrical port-constituting a valve-seating arranged to'put the said inlet into communication with the said outlet,=said block having'acylindrical guide-way of a diame-- ter larger than said port disposed co-axially with r the said va1ve-seating, a; piston-valve having one portion cooperating withsaid valve-seating and another portion of larger 1% diameter guided by said guide-way,-and a float-arm operatively connected to the piston-valve, substantially as described.

5.;In apparatus for automatically controlling the flow of feed-water to a boiler, the

combination of a valve chest having" an ini let and an outlet a' valve-seating blockfitted into the wall of the valve-chestg said block larger diameter constituting a guide-way a1 rangedoo-axiaIIy with tile valve-seating ia i o 1 7 B piston-valve'havmg one portion cooperatmg 7 with said valve-seating 'and another sub- Y ,stantially cylindrical portion of larger diameter 'guided by said guide-way, and a float-arm operatively connected with said 15' piston-valve, substantially as described. "In testimony whereof I afiix my signature.

ALFRED HYMAN ANTHONY.

Copies of thin patent may be obtained for ave eenti each, by'ad dreulng the Commissioner of Patents, walhlngton' ll. 0.7 

